*{
    margin: 0;
    padding:0;
}
main{
    width: 100%;
    height: 767px;
   
    
}
#mainleft{
    width:250px;
    height: 767px;
    float: left;
    background-color: #0f0f0f;
    background-image: url(../img/stars.png);
    background-position: left bottom;
    background-size: 250px;
    background-repeat: no-repeat;
  
}
#mainleft ul{
    width: 250px;
    height: 440px;
    margin-top:100px
}
#mainleft li{
    padding-left: 40px;
    width: 150px;
    height: 40px;
    list-style: none;
    font: normal 500 16px/36px "PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC","Microsoft YaHei","SimHei",Helvetica,Arial,serif;
    color: rgba(255,255,255,0.4);
}
#mainleft li:hover{
    color:#fff;
}
#mainright{
    width: calc(100% - 250px);
    height: 767px;
    float:right;
    
    background: url(../img/r01_03.gif)no-repeat;
    background-size: 100% 100%;
    overflow: hidden;
}
